How to find out if your ancestor served on a Navy submarine
Researcher
Wed Jan 07 2026
•
< 5 minutes read
On Royal Navy submarines, steel hulls groaned as they slipped beneath the waves, daylight fading to black. Did your ancestor live a life of secrecy and service below the ocean's surface?
Start with what you already know about their service
Begin by gathering every clue you have. A name, approximate dates of service, or a photograph showing a dolphin badge or naval uniform can point you in the right direction. Submarine service was specialised, so even a brief mention in a letter or record can be significant.
Read between the lines
If you know your ancestor served in the Royal Navy during the First or Second World War, you may need to do some detective work to uncover their story. Many sailors transferred into submarine service after initial training, meaning their records may not say 'submarine' outright.
Brush up on the history of submarines in the Royal Navy
Submarines formed a distinct and secretive arm of the Royal Navy from the early 20th century.
Crews were small, highly trained and bound by extraordinary trust. Patrols could last weeks, with men living inches from machinery, torpedoes and each other.
Submariners often earned additional pay and distinctive insignia, and their service could involve covert missions, intelligence gathering, and dangerous attacks on enemy shipping. Losses were high, and many submarines never returned - their stories preserved only in official logs and casualty lists.
Submarines' role in the First and Second World Wars
During the First World War, British submarines disrupted German supply lines in the North Sea and played an important role in the Battle of Jutland. The interwar period saw a concerted focus on training, as submarines were advanced technologically. Submarines were involved in successful underwater warfare during the Second World War, with ships like HMS Upholder crippling Axis supply routes.
From the HMS Holland to today's ballistic missile submarines (SSBNs), the history of British Navy submarines is one of endurance and evolution.
Search Royal Navy records online
Royal Navy stories are now at your fingertips, thanks to a growing online archive of naval records charting service from Trafalgar to the Second World War. In partnership with the National Museum of the Royal Navy, Findmypast has brought together exclusive and previously unseen material that can help you trace submariners and the vessels they served on.
Key record sets to search include:
- Royal Navy service records, which may note submarine qualification or postings
- Ship and submarine muster rolls, listing crew members aboard specific vessels
- Casualty lists and loss registers, documenting submarines and crews lost to the deep
- Medal and honours records, which sometimes reference submarine operations
By tracing a sailor through these records, you may follow them as they slip beneath the surface on covert missions, patrol enemy waters, or take part in pivotal moments of naval warfare.
Look for ships, not just names
If your ancestor's service record doesn't mention submarines directly, search by vessel. Identifying a submarine name can unlock a wealth of information about its movements, patrols and fate.
Once you know the submarine, you can explore action reports, casualty logs and contemporary accounts that place your ancestor within a specific crew. This approach is handy when names are common, or service records are incomplete.
Delve deeper into the story with newspapers and personal accounts
Newspapers help you to delve deeper into life on board a naval submarine, filling in the gaps left by records with colourful, personal stories. Within reports of lost submarines and homecoming celebrations, you'll often find crew members named, with the perils they faced laid bare in vivid detail.
Obituaries may mention 'silent service' or 'submarine flotilla', while family notices sometimes hint at the secrecy that surrounded their work. These fragments help you understand not just what your ancestor did, but what it meant to those waiting at home.
Understanding naval experiences
Whether you're mapping the story of a fleet, a ship, a hero, or a family legacy forged in saltwater, submarine research rewards patience. By combining service records, ship histories and newspapers, you can delve deeper into the hidden world your ancestor inhabited.
These men, along with the pioneering women of the WRNS (Women's Royal Naval Service), lived lives defined by secrecy and endurance. Their stories are no longer lost to the deep - they're waiting to be rediscovered online.